Grease-cup



J. F. MACINDE.

GREASE CUP.

APPLICATION FILED SEPT. 22. 1919.

Patented Sept. 21;1920.

NH. l

1ra/mon JOI/N H1/7610005 l UNITED STATES PATENT OFFICE.

GREASE-CUP.

Specication of Letters Patent. Patented Sept. 21, 1920.

Application filed September 22, 1919. Serial No. 325,352.

Vlubricant is automatically ejected by means of pressure applied thereto, and is a modification of the device shown in Letters Patent No. 1,283,841 under date of November In the application above referred to an object was to provide a device that would deliver a constant and uniform flow or movement of the 'lubricant to the bearing and as well the prevention of the flooding of the cup at the beginning of the stroke of the plunger. Y

rfhese objects were attained by means of a straight control valve stem, terminating in a cylindrical plug member operable in a shank having a continuously tapering outlet, the taper extending throughout the entire length of said shank and gradually increasingin diameter from the upper to the lower extremity thereof, providing a gradually increasing area for the flow of the lubricant after the plug memberhad descended substantially its own length within the shank,

in proportion to the pressure means.

Similar functions are objects ofthe pres-- ent device, the control valveV stem, terminating in a tapering valve member, however, in this instance, descending from its point of connection with the plunger in a tapering manner into a straight part of the shank outlet, thereby preventing the flooding of the said outlet at the initial stroke of the plunger. The said oulet then tapering from such point to its terminus, providing a grad-Y ually increasing area for the flow of the lubricant, in proportion to the weakening of the pressure means.

In the further disclosure of the invention reference is to be had to the accompanying drawings, constituting a part of this specification, Vin which similar characters of reference denote corresponding parts, in all views, and in which;

Figure 1 is a vertical sectional view of the usual type of grease cup, before compressing, with my spring actuated plunger or pis'- ton in position;

F ig. 2 is a similar view to Fig. 1, the spring being, however, but partially compressed and showing the control valve in the straight part of the shank outlet;

F ig. 3 is likewise a vertical sectional View of the usual type of grease cup, after com-- pression;

Fig. 4L is a vertical sectional view of the control valve stem and valve member, and

F ig. 5 is a detail View of the flat sided screw used to increase the flow of the lubricant.

Referring in detail to said views the character a designates the body or barrel of a grease cup, the interior portion b thereof comprising a receptacle for the'lubricant.

A cap or cover c is provided to fit slidingly over the barrel a and has a suitable opening to permit of the stem Z passing' therethrough. Said stem d is drilled and threaded centrally at its base to receive the threaded end f of the control valve stem g.

A plunger h is held in position by the engagement of the control valve stem g with the stem d. As the stern g is screwed into the threaded portion of the stem Z it holds the plunger h securely, making the three parts one operative unit. Said plunger 7L is provided with a suitable opening for the passage of the threaded end of the stem g. A washer a' is provided, as shown, to iirmly hold the parts in alinement.

rIhe shank j is formed, as illustrated, having a straight bore lo for a portion of its depth and then tapering to its terminus.

The control valve stem g terminating in the control valve memberg descends in a tapering manner from its point of connection with the plunger it loosely into the straight part or bore 7c of the shank. This straight portion of the bore or outlet 7c should eX- tend to such a depth that at the initial stroke of the plunger h, the control valve member g will enter same the entire depth of said straight bore, limiting the area of the flow of lubricant at Athe initial stroke of the plunger h. As before said from this point downwardly the said bore or shank outlet [c tapers to its terminus, providing a cess delivery of the lubricant during the.. Vfirst part of the stroke. As the plunger descends the spring weakens and the ilow of lubricant diminishes proportionately.

Said shank 7' is exterior-ly threaded at its lower extremity.

The control valve member g is provided in its lower portion'with the vertical port m communicating with the horizontal port Z.

The vertical port m is interiorly threaded at its base to engage the exterior-ly threaded portion 0 of the fiat sided screw n. Y

In operation the barrel t is filled with lubricant, the cap or cover c, containing the plunger, which at this time is at its extreme down stroke or on a level with the outlet or lower part of cover c and the spring p is expanded to full stroke length, is slid over the upper or open end of the barrel a, which causes the said plunger L to enter the interior of the barrel a and in contact with the lubricant.

compressing the spring p. The cover then locked. The control valve is in position and the cup is ready to deliver the lubricant. The expansion of the spring p gradually displaces the lubricant in such amount as is regulated by the operation of the control valve within the shank. During the initial stroke oi the plunger the control valve, which is tapered, descends into the straight bore or outlet or the shank, limiting the area for the iow of the lubricant at this point, Y

after which the tapered control valve descends into the tapered part oi the shank outlet providing'a gradually increasing area As the cover is forced down-A wardly, the plunger L is forced upwardly,

fof the screw and the bottom of the control valve member g.

I claim:

l. The combination of a lubricating cup l having a spring actuated plunger, a tapering valve stem .terminating in a tapering valve member, operatively secured thereto, adapted to fit looselyV within the opening of the shank, a shank having a straight outlet for a portion of its depth to limit the area of the flow of the lubricant during the initial stroke or' the plunger' and after the control valve member has descended therein, and then tapering to its terminus thereby providing a gradually increasing-area' for the flow oi'the lubricant in proportion to the weakening of the pressure means.

2. The combination of a lubricating cup having a spring actuated plunger, a tapering valve stem terminating in a tapering valve member, operatively secured thereto, adapted to t loosely within the opening of the shank, said valve being provided with a horizontal port and a vertical port communicating therewith, a shank having a straight outlet for a portion of its'depth to limit the area of the iiow of the lubricant during the initial stroke of the plunger and after the control valve member has descended therein, and then tapering to its terminus thereby providing a gradually increasing area for the flow of the lubricant in proportion to the weakening of the pressure means and means to increase the flow of the lubricant.

.In testimony whereof I aiiiX my signature.

. JOHN FRANKLIN MACINDOE.

Witness:

M. VAN BoosKiRK. Y 

